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Finding the Fourth Proportional to 417.14, 624.90 and 211.46

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Solution

The fourth proportional to 417.14, 624.90 and 211.46 is: 316.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.14 : 624.90 = 211.46 : x
  2. Step 2: Convert to fraction form
    417.14/624.90 = 211.46/x
  3. Step 3: Cross multiply
    417.14x = 624.90 × 211.46
  4. Step 4: Simplify right side
    417.14x = 132,141.35
  5. Step 5: Solve for x
    x = 132,141.35/417.14
  6. Step 6: Final answer
    x = 316.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.